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Can Proximity and Vicinity RFID Tags Be Used Together?
What are some problems inherent to placing both types of tags within the same document?
If the transponders' antennas were to touch, they would become detuned, thereby preventing them from being read. If the transponders were attached on top of a document, one on top of another, that would likely lead to the one below not being interrogated. The antenna of the top tag would block the energy from reaching the tag below. If the tags were embedded in the document a reasonable distance apart, however, you should not encounter difficulty reading them.
—Mark Roberti, Founder and Editor, RFID Journal
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